Marcotte grew up in Leominster, attended the Bancroft School in Worcester, and then graduated from BU in 2011 with honors.

She was known for her love of running and volunteering. Friends and colleagues told WCVB she was loved, passionate and giving.

Marcotte was living in New York City, where she worked for Google as an account executive.

“Vanessa Marcotte was a much loved member of the Google team, working in our New York office for the last year and a half, and known for her ubiquitous smile, passion for volunteer work, and love of Boston sports," Google said in a statement. We are deeply shocked and saddened, and our thoughts are with her family and friends.”

Three photos of Vanessa Marcotte

Why was she in Princeton, Mass.?

Marcotte came to visit with her mother and aunt who live there.

She went out for a walk or a jog Sunday afternoon and was reported missing when she didn't return.

What happened to Vanessa?

A state police source at the scene told NewsCenter 5 that it was not immediately clear if Marcotte was assaulted, but her body was found naked. Her hands, feet and part of her head were burned, the source said.

“A preliminary review of the body has led detectives to believe this is a homicide investigation,” District Attorney Joseph Early Jr. told reporters.

Who did this?

Sources told 5 Investigates a man was arrested in Worcester Friday night. Authorities said Colon-Ortiz is facing multiple charges in connection to her death.

Detectives announced on Nov. 16 that they were looking for a dark-colored SUV that was seen around the time of the murder.

Early said Saturday that an alert state trooper spotted an SUV matching the description being driven by a man who matched the description of the suspect. The trooper wrote down the license plate of the SUV, tracked down Colon-Ortiz and obtained a DNA sample, which matched DNA found at the crime scene.

"We do not know if this is a random act," Early said.

Anyone with information about the case is urged to call Massachusetts State Police at 508-453-7589.